3/4 in x 300 in. Self sticking on both sides. Unconditional guarantee. Questions? 1-888-423-0139. Note: when using on walls or other surfaces always test tape on area with least exposure to avoid damage and claims. Permanent Tape: Ideal for non-repositionable attaching and mounting, depending on substrate material. Note: may not be suitable for use on heavy stock materials. Made in China.